- 1 The Killer Dust
This investigative report by Horizon covers an investigation into the deaths of people who inhaled asbestos dust at Acre Mill, Yorkshire, England.
Air Date: 1975-01-20
- 2 A Time to Be Born
Horizon investigates the growing tendency in hospitals in Britain to induce childbirth by injecting the hormone oxytocin into expectant mothers.
Air Date: 1975-01-27
- 3 The Unsafe Sea
This episode of Horizon examines the problems of ship safety in the English Channel.
Air Date: 1975-02-10
- 4 The Change of Life
Horizon investigates the symptoms of menopause and the various degrees in which it occurs.
Air Date: 1975-02-17
- 5 Project Fido
This episode of Horizon shows the peril to man of the ever increasing dog population in the western world.
Air Date: 1975-02-24
- 6 The Long, Long Walkabout
This report by Horizon covers an investigation by a group of Australian scientists that looks into the origins and history of the Australian Aborigines.
Air Date: 1975-04-07
- 7 The Overworked Miracle
This report by Horizon describes the resistance to antibiotics, fast growing in all countries, and the dangers it could mean for the future.
Air Date: 1975-04-14
- 8 Not the Cheapest, But the Best
Horizon investigates the life and work of the great engineer, Isambard Kingdom Brunel.
Air Date: 1975-04-21
- 9 A Spoonful of Roughage
Horizon explores the effect of fibre in diet on the diseases of western world.
Air Date: 1975-04-28
- 10 Brain Poison
Horizon presents an investigation into the effects on health of lead in the urban atmosphere.
Air Date: 1975-05-05
- 11 The Bulldog's Last Bark
This is a Horizon report on the building of the British military deterrent from the first decision to make it in 1941 until the present state of lethargy.
Air Date: 1975-05-12
- 12 Benjamin
This episode of Horizon follows the progress of Benjamin Pile, born on 22 November, 1974, at Oxford in Britain.
Air Date: 1975-05-19
- 13 The McMaster Experiment
This report by Horizon covers an experiment at McMaster University Medical School, in Ontario, Canada.
Air Date: 1975-06-02
- 14 The Glazed Outlook
Horizon investigates the attempts by the University of Newcastle in England to define and create an ideal living and working environment.
Air Date: 1975-06-09
- 15 The Three Chord Trick
Horizon explores the psychology of music, as it explains why music has such a powerful emotive effect in every society.
Air Date: 1975-06-16
- 16 The Cleanest Place in the World
This report by Horizon brings you scientists that are using Antarctica as a giant natural lab to study who has polluted Earth most; man or nature.
Air Date: 1975-06-23
- 17 Strange Sleep
Horizon investigates the discovery of gaseous anaesthetic from 1840 until the early years of 20th century.
Air Date: 1975-06-30
- 18 The Greatest Advance Since the Wheel?
Horizon reports on the history of superconductivity, from discovery, to the present.
Air Date: 1975-07-07
- 19 How Do You Read?
In this documentary, Horizon reports on the reading process; how it works for the fluent, and how it should be taught.
Air Date: 1975-07-14
- 20 The Sickly Sea
This episode of Horizon describes the various aspects of the pollution problem of the Mediterranean Sea.
Air Date: 1975-07-21
- 21 Happy Catastrophe
In this Horizon episode, Rene Thom's mathematical discovery of the catastrophe theory is investigated.
Air Date: 1975-07-28
- 22 To Die, to Live - The Survivors of Hiroshima
This documentary by Horizon commemorates the dropping of the A-bomb on Hiroshima, Japan on August 6, 1945.
Air Date: 1975-08-04
- 23 Cannabis
Horizon takes a look at the history of cannabis and the research on the effects of smoking marijuana.
Air Date: 1975-08-11
- 24 Meditation and the Mind
This is a report by Horizon on Transcendental Meditation, or TM, brought to the West by the Maharishi Mahesh Yogi.
Air Date: 1975-08-18
- 25 The Trobriand Experiment
This documentary by Horizon is about the Trobriand islanders, whose culture is based on the Kula, a communication system of giving and receiving.
Air Date: 1975-12-29